CN110842088A - Sizing die - Google Patents

Abstract

The invention discloses a sizing die which comprises an upper die and a lower die which are arranged in a split mode, wherein arc-shaped grooves are formed in the side faces of the upper die and the lower die respectively, after the upper die and the lower die are assembled, the arc-shaped grooves are spliced to form a sizing hole for a cable core and a metal belt to penetrate through, and a plurality of ball springs are embedded in the surface of each arc-shaped groove. According to the invention, the metal belt is compacted at the outer side of the cable core through the ball spring, so that on one hand, the inaccurate size of a sizing die can be prevented, and on the other hand, the water seepage condition caused by a gap between the metal belt and the cable core can be prevented; and because the sizing die is the components of a whole that can function independently structure by upper and lower mould, when the sizing die appears local damage, can need to change upper mould or lower mould, need not to change whole sizing die, reducible maintenance cost, and when changing, can directly take out upper mould or lower mould that will change again with upper die or lower mould that need take out can, it is comparatively convenient to operate.

Description

a sizing die

technical field

The invention relates to the field of molds for optical cable production, in particular to a sizing mold.

Background technique

In the production process of the optical cable, it is necessary to cover the cable core with a longitudinal cladding layer that protects the cable core. , preforming die, lap die, and sizing die device. The function of the sizing die device is to deform the flat metal strip into a tubular structure when the metal strip passes through the longitudinal wrapping die. The irregular bulge formed by the overlapping edges of the two longitudinal wraps, the so-called lotus leaf, is repaired. After the longitudinal wrapping is formed by the sizing die device, the original strip is formed into a complete The cylindrical shape makes the structure of the cable core more compact and reduces the process size of the cable core. Finally, the package with the tighter cable core is sent to the extrusion head for finished product extrusion.

The sizing die in the prior art is usually a sizing hole with a corresponding diameter on the solid material according to the measurement of the outer diameter of the cable core after the metal tape is overlapped to form a tubular structure, which makes a cable core of one specification correspond to a specific size. The sizing die is usually pre-processed before starting the machine, and the cable core can be directly passed through the sizing hole of the sizing die when used.

However, due to the integrated structure of the above-mentioned sizing die, when the sizing die is partially damaged, the entire sizing die needs to be replaced, and when replacing, it is necessary to stop the belt to replace it, the replacement and maintenance costs are high, and the replacement process is relatively cumbersome.

In addition, the existing sizing die cannot compress the metal tape wrapped on the outside of the cable core according to the size of the cable core, there is a gap between the cable core and the outside of the metal tape, and water seeps during the process of overlapping the metal tape. .

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a sizing die, which can compress the overlapping edge of the metal strip while the metal strip is longitudinally wrapped outside the cable core, so as to prevent water seepage at the overlapping edge, and can be used in production Easy to replace during the process.

In order to solve the above-mentioned technical problems, the present invention provides a sizing die, comprising an upper die and a lower die arranged separately, the sides of the upper die and the lower die respectively have arc-shaped grooves, and the upper die and the lower die are combined with each other. After moulding, the arc-shaped grooves are spliced to form a sizing hole for the cable core and the metal belt to pass through, and a plurality of ball springs are embedded on the surface of the arc-shaped groove.

In a preferred embodiment of the present invention, the ball spring further includes a base embedded in the arc-shaped groove, the base is provided with a spring and a ball, the ball is fixedly arranged at the end of the spring, and the ball The end face protrudes from the arc-shaped groove.

In a preferred embodiment of the present invention, a dovetail connection structure is further provided at the mold clamping connection between the upper mold and the lower mold.

In a preferred embodiment of the present invention, the dovetail connection structure further includes a dovetail groove and a dovetail tenon matched with the dovetail groove.

In a preferred embodiment of the present invention, it further comprises that a stop step is protruded on the outer peripheral surface of the sizing die.

In a preferred embodiment of the present invention, it further includes that the upper mold and the lower mold are both semi-circular ring structures.

In a preferred embodiment of the present invention, it further includes that the sizing hole is a circular sizing hole.

In a preferred embodiment of the present invention, it further comprises that the surface of the ball is smooth and free of burrs.

Beneficial effects of the present invention:

1. The sizing die of the present invention is embedded with a plurality of ball springs on the inner surface of the sizing hole. During the process of wrapping the metal belt longitudinally on the outside of the cable core, the metal belt is compressed on the outside of the cable core by the ball spring , on the one hand, it can prevent the size of the used sizing die from being inaccurate, and on the other hand, it can prevent the gap between the metal tape and the cable core and water seepage.

2. The sizing die of the present invention adopts the upper die and the lower die set separately. The upper die and the lower die are buckled together to form a sizing hole for the cable core to pass through. The split structure of the die, when the sizing die is partially damaged, the upper die or the lower die may need to be replaced, and the entire sizing die does not need to be replaced, which can reduce maintenance costs and facilitate operation.

Description of drawings

Fig. 1 is the structural representation of the sizing die of the present invention;

FIG. 2 is a schematic structural diagram of the ball spring of the present invention.

Description of the symbols in the figure: 1, upper die; 2, lower die; 3, arc groove; 4, sizing hole; 5, ball spring; 51, base; 52, spring; 53, ball; 6, dovetail connection Structure; 61, dovetail groove; 62, dovetail tenon; 7, stop step.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

Referring to FIG. 1 , an embodiment of the sizing die of the present invention includes an upper die 1 and a lower die 2 arranged separately, and the sides of the upper die 1 and the lower die 2 respectively have arc-shaped grooves 3, After the upper mold 1 and the lower mold 2 are closed, a sizing hole 4 for the cable core and the metal belt to pass through is formed. When damaged, the upper die 1 or the lower die 2 may need to be replaced, but the entire sizing die does not need to be replaced, which can reduce maintenance costs and make the operation more convenient; the surface of the arc groove 3 is embedded with a plurality of ball springs 5. During the process of longitudinally wrapping the metal tape on the outside of the cable core, the metal tape is pressed against the outside of the cable core by the ball spring 5. On the one hand, it can prevent the size of the used sizing die from being inaccurate, and on the other hand, it can prevent the metal tape from interacting with the cable core. There are gaps between them and water seepage occurs.

Referring to FIG. 2 , the ball spring 5 includes a base 51 embedded in the arc-shaped groove 3 , the base 51 and the arc-shaped groove 3 are integrally formed, and the base 51 is provided with a spring 52 and balls 53. The inner end of the spring 52 is fixed at the bottom of the base 51, the ball 53 is fixed at the outer end of the spring 52, and the end surface of the ball When the belt and the cable core pass through the sizing hole 4, the ball 53 can press the metal belt to the outside of the cable core by the pressure of the spring 52 while rolling. In order to prevent the ball 53 from scratching the metal belt, the ball The surface of 53 is smooth and free of burrs.

In order to clamp and fix the upper mold 1 and the lower mold 2, a dovetail connection structure 6 is provided at the mold clamping connection of the upper mold 1 and the lower mold 2 of the present invention, and the dovetail connection structure 6 includes a dovetail groove 61 and The dovetail tenon 62 matched with the dovetail groove 61, when the upper mold 1 is provided with the dovetail groove 61, the lower mold 2 is provided with the matching dovetail tenon 62, when the upper mold 1 is provided with the dovetail tenon 62 When the lower mold 2 is provided with a matching dovetail groove 61, by inserting the dovetail tenon 62 longitudinally into the dovetail groove 61, the mold clamping and splicing of the upper mold 1 and the lower mold 2 can be realized, and at the same time, it can prevent the fixed The diameter hole 4 is radially expanded.

Specifically, a stop step 7 is protruded on the outer peripheral surface of the sizing die, and the stop step 7 is used to cooperate with the corresponding tooling to prevent axial slippage.

Specifically, the upper mold 1 and the lower mold 2 are both semi-circular ring structures. After the upper mold 1 and the lower mold 2 are opened, the maximum mold opening radius is ensured, which is convenient for the upper mold 1 and the lower mold 2 to be removed from the cable core. and the outside of the metal belt are removed.

Preferably, the cable core is a circular cable core, and the sizing hole 4 in this embodiment is also a circular sizing hole 4

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims (8)

1. a sizing die, is characterized in that, comprises the upper die and the lower die set separately, the side surface of described upper die and lower die has arc groove respectively, after described upper die and lower die are moulded, all The arc-shaped grooves are spliced to form sizing holes for the cable core and the metal belt to pass through, and a plurality of ball springs are embedded on the surface of the arc-shaped grooves. 2 . The sizing die according to claim 1 , wherein the ball spring comprises a base embedded in the arc-shaped groove, the base is provided with a spring and a ball, and the ball is fixedly arranged on the side of the spring. 3 . At the end, the end face of the ball protrudes from the arc-shaped groove. 3 . The sizing die according to claim 1 , wherein a dovetail-type connection structure is provided at the clamping connection between the upper die and the lower die. 4 . 4 . The sizing die according to claim 3 , wherein the dovetail connection structure comprises a dovetail groove and a dovetail tenon matched with the dovetail groove. 5 . 5 . The sizing die according to claim 1 , wherein a stop step is protruded on the outer peripheral surface of the sizing die. 6 . 6 . The sizing die according to claim 1 , wherein the upper die and the lower die are both semi-circular ring structures. 7 . 7. The sizing die according to claim 1, wherein the sizing hole is a circular sizing hole. 8. The sizing die according to claim 2, wherein the surface of the ball is smooth and free of burrs.

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